/* Container Utama Chapter */
.sp-chapter-container {
    background: #ffffff;
    border: 2px solid #1e3a8a;
    border-radius: 10px;
    overflow: hidden;
    margin: 20px auto;
    max-width: 1080px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Header Chapter */
.sp-chapter-header {
    background: #1e3a8a;
    padding: 16px 24px;
    color: #ffffff;
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 0.5px;
}

/* Tab Bar Navigasi Lesson (1 Lesson = 1 Tab) */
.sp-tabs-nav {
    display: flex;
    background: #2563eb;
    overflow-x: auto;
}

.sp-tab-btn {
    background: transparent;
    border: none;
    color: #dbeafe;
    padding: 12px 20px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    border-right: 1px solid rgba(255,255,255,0.15);
    white-space: nowrap;
    transition: all 0.2s;
}

.sp-tab-btn:hover {
    background: rgba(255,255,255,0.1);
    color: #ffffff;
}

.sp-tab-btn.active {
    background: #ffffff;
    color: #1e3a8a;
    border-bottom: 3px solid #1e3a8a;
}

/* Wadah Tab Konten */
.sp-tab-pane {
    display: none;
    padding: 24px;
}

.sp-tab-pane.active {
    display: block;
}

/* Layout 2 Kolom Sesuai Mockup */
.sp-lesson-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 24px;
    align-items: stretch;
}

@media (max-width: 820px) {
    .sp-lesson-layout {
        grid-template-columns: 1fr;
    }
}

/* Kolom Kiri: Background Putih Bersih untuk Foto */
.sp-illustration-box {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
}

.sp-lesson-img {
    max-width: 100%;
    max-height: 420px;
    object-fit: contain;
    background: transparent;
}

.sp-img-empty {
    color: #94a3b8;
    font-weight: 600;
}

/* Kolom Kanan: Kotak Materi Pokok */
.sp-main-card {
    background: #2563eb;
    border-radius: 8px;
    padding: 20px;
    color: #ffffff;
    margin-bottom: 16px;
}

.sp-en-main {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 12px;
}

.sp-id-main {
    font-size: 14px;
    line-height: 1.5;
    color: #fef08a; /* Kuning kontras sesuai mockup */
    border-top: 1px solid rgba(255,255,255,0.25);
    padding-top: 10px;
}

.sp-audio-bar {
    margin-top: 14px;
    text-align: right;
}

.sp-btn-tts {
    background: #1e3a8a;
    color: #ffffff;
    border: none;
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
}

/* Grid Tips Coach (Biru & Hijau) */
.sp-tips-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

@media (max-width: 600px) {
    .sp-tips-grid {
        grid-template-columns: 1fr;
    }
}

.sp-tip-card {
    border-radius: 8px;
    padding: 14px;
    font-size: 13px;
    line-height: 1.45;
}

.sp-tip-card strong {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
}

.sp-tip-card p {
    margin: 0;
}

.sp-tip-blue {
    background: #ffffff;
    color: #ffffff;
}

.sp-tip-green {
    background: #ffffff;
    border: 3px solid #16a34a;
    color: #14532d;
}

/* Strip Pertanyaan (Conditional) */
.sp-question-strip {
    background: #3b82f6;
    border-radius: 8px;
    padding: 12px 18px;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 18px;
}

.sp-q-tag {
    background: #1e3a8a;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 800;
    margin-right: 8px;
}

.sp-q-sub {
    color: #fef08a;
    font-size: 13px;
    margin-left: 6px;
}

.sp-btn-icon {
    background: #1e3a8a;
    border: none;
    color: #fff;
    border-radius: 50%;
    width: 34px;
    height: 34px;
    cursor: pointer;
    font-size: 16px;
}

/* Fitur "Let's Try to Speak" */
.sp-try-speak-box {
    background: #f8fafc;
    border: 1px dashed #3b82f6;
    border-radius: 8px;
    padding: 16px;
    margin-top: 20px;
}

.sp-try-header {
    font-weight: 800;
    font-size: 15px;
    color: #1e3a8a;
    margin-bottom: 8px;
}

.sp-try-desc {
    display: block;
    font-weight: normal;
    font-size: 13px;
    color: #64748b;
}

.sp-try-input-group {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.sp-user-id-input {
    flex: 1;
    border: 1px solid #94a3b8;
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 14px;
}

.sp-btn-generate-pattern {
    background: #2563eb;
    color: #ffffff;
    border: none;
    border-radius: 6px;
    padding: 8px 16px;
    font-weight: 700;
    cursor: pointer;
}

.sp-interactive-sandbox {
    margin-top: 12px;
    padding: 12px;
    background: #ffffff;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
}

.sp-sandbox-result {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sp-target-text {
    font-weight: 800;
    font-size: 16px;
    color: #0f172a;
    flex: 1;
}

.sp-btn-mic {
    background: #dc2626;
    color: #fff;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 700;
}

.sp-btn-sound {
    background: #0284c7;
    color: #fff;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
}

.sp-voice-feedback {
    margin-top: 8px;
    font-size: 13px;
}

/* Navigasi Next / Previous */
.sp-nav-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 24px;
    padding-top: 14px;
    border-top: 1px solid #e2e8f0;
}

.sp-nav-arrow {
    background: #2563eb;
    color: #ffffff;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s;
}

.sp-nav-arrow:hover {
    background: #1d4ed8;
}